Etna: Activity increases

The activity on Etna in Sicily seems to be slightly increasing again. The LGS registered sounds that could be caused by explosive activity with its infrasonic microphones and issued an “early warning” of level yellow. Visual confirmation of the activity was provided in the form of images posted by Dr. Boris Behncke of the INGV. They are similar to what we last saw of the volcano in December. There is an active vent in the Voragine that supports glowing tephra. Small ash clouds rose from the New South East Crater and the Northeast Crater. MIROVA registers weak to moderate heat radiation. The tremor is normal.

Anak Krakatoa: New eruptions

The Indonesian island volcano Anak Krakatau continues to be explosively active and produces volcanic ash. The VAAC Darwin reports ash at 2400 m altitude. MIROVA recorded a weak thermal anomaly with a power of 3 MW and seismic activity is elevated. Unfortunately, there are no longer any usable LiveCam images, because the ash erupted yesterday has soiled the camera.

The VSI recorded 18 seismic signals caused by explosive eruptions. The longest lasted 62 minutes. Harmonic tremors were also recorded. Already at the beginning of the month the earthquakes increased with a low frequency and indicated that magma was moving underground. Further eruptions can be expected.

The eruptions started on 29 December 2019, and initially the volcano increased its activity and erupted phreatic. In the evening, glowing tephra and volcanic ash was also produced.